Perform a handover from a second generation RAT to a fourth generation RAT

摘要

A transition from a UE from a first RAT to a third RAT in an environment with a first RAT, a second RAT and a third RAT. The first RAT may be a second generation RAT, the second RAT may be a third generation RAT, and the third RAT may be a fourth generation RAT. The network from the first RAT can not provide information (eg, a neighbor list) for the third RAT. The UE may perform information for making a measurement of one or more base stations from the third RAT without connection to the second RAT. For example, the UE may use previously stored information to perform the measurement of the third RAT. Alternatively or additionally, the UE may receive the information (eg, from a system information block) from the second RAT without connection to the second RAT. The UE may then move from the first COUNCIL to the third COUNCIL.